package cn.edu.scau.cmi.dengzejun.chapter06;

public class A {
	final double PI =3.1415926;
	public double GetArea(final double r) {
		return PI *r*r;
	}
	
	public final void speak() {
		System.out.println("Hollo,how's everything here?");
		return;
	}
	
	double f(double x,double y) {
		return x+y;
	}
	
	static int g(int n) {
		return n*n;
	}
}
